Ford 144-250 inline 6 high performance building
From Crankshaft Coalition Wiki
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==Preface== | ==Preface== | ||
You need to first determine what the final results are desired for the inline 6 engine build. | You need to first determine what the final results are desired for the inline 6 engine build. | ||
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==Heads== | ==Heads== | ||
| − | When working on the cylinder heads on the older engines (1960-'68) the 1960-'68 heads do not flow well. Replacement 1969-up heads are better, particularly casting numbers D8 and E0 heads, which would come in 1979-'83 model years. These heads have 1.75" intake/1.36" exhaust valve sizes. The exhaust valve seat can be machined to 1.5". The drawback to these heads is the chamber size is 62cc, 1960-'68 heads are 52cc, so compression drops approximately 1 point. There are also Australian cylinder heads with removable intake manifolds, but they are expensive. There was an aftermarket aluminum head | + | When working on the cylinder heads on the older engines (1960-'68) the 1960-'68 heads do not flow well. Replacement 1969-up heads are better, particularly casting numbers D8 and E0 heads, which would come in 1979-'83 model years. These heads have 1.75" intake/1.36" exhaust valve sizes. The exhaust valve seat can be machined to 1.5". The drawback to these heads is the chamber size is 62cc, 1960-'68 heads are 52cc, so compression drops approximately 1 point. There are also Australian cylinder heads with removable intake manifolds, but they are expensive. There was an aftermarket aluminum head From Matt Cox at Vintage Inlines. |
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| + | The aluminum head with the detachable manifold, which flows worlds better than the stock "log" type, has recently become available again. They are now being sold by a company by the name of vintage inlines which is the spiritual successor to classic inlines after the company closed its doors due to the death of the owner. The heads are available for the same price classic inlines sold them for. However, the price may vary depending on additional modifications requested such as porting and larger valve sizes. It should also be noted that the head has a different temperature sending unit at the back of the head in the stock location it is a smaller size but is easily found a local auto parts stores. Lastly, the "base model" and also cheapest aluminum head vintage inlines sells has 1.8 inch intake valves and 1.5 inch exhaust valves with a 55 cc camber. The head also comes with aftermarket dual valve springs which claim the following specs closed 110 lbs, open 260 lbs, inst hgt 1.68, duration up to 280 with all other specs being user verified. | ||
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| + | Also, on the note of stock "log" head modifications there is an Offenhuaser kit which requires to holes to be drilled into the manifold allows for the mounting of three one barrel carbs to increase performance the kit can be found in a variety of places such as Summit Racing, Jegs, Vintage Inlines, and Clifford Performance. Many have also took it upon themselves to machine off the stock log part of the head entirely mounting things like individual motorcycle carbs or flanges akin to the ones seen on the aluminum and OZ 250 head to mount home made intakes. | ||
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Originally, Ford used a steel shim head gasket that was 0.025" compressed, these are no longer available. What is available today are composite head gaskets that range from 0.045"-0.055" compressed, so the cylinder head must be machined at least 0.025" to make up the difference. If you use the larger 62cc chamber, the head will need to be planed down a bit more depending on the desired compression ratio. These heads can be milled 0.090" maximum. | Originally, Ford used a steel shim head gasket that was 0.025" compressed, these are no longer available. What is available today are composite head gaskets that range from 0.045"-0.055" compressed, so the cylinder head must be machined at least 0.025" to make up the difference. If you use the larger 62cc chamber, the head will need to be planed down a bit more depending on the desired compression ratio. These heads can be milled 0.090" maximum. | ||
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| + | Finally, there have been a few "crazy" head swaps which I will link to because the article does a much better job than I could. The basic idea is swapping heads off other later ford inline six engines, such as the Aussie cross flow head, onto the 200 short block which requires modifications to the block. | ||
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| + | https://fordsix.com/archive/www.classicinlines.com/XFheadswap.html | ||
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| + | If you would like to know more on the topic of 200ci cylinder heads and how they all stack up against each other I would suggest visiting the classic inlines tech archives which has everything you would ever want to know. (linked below). | ||
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| + | https://fordsix.com/archive/www.classicinlines.com/Tech.html | ||
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| + | PICTURES FOR REFERENCE | ||
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| + | stock log type | ||
| + | https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRx9oGS2BEzT-ghJTiRGeoCCA7rq6FYMakmpdvuejOP2Ww3U1PioA | ||
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| + | Stock log/ hex head | ||
| + | http://i41.tinypic.com/2zjj31g.jpg | ||
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| + | Aussie 250 2v head | ||
| + | https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSW-VOY5m8mVVdhF6okMh2O0BDaoyZO3_HamTScYndon8CWulXgbg | ||
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| + | Classic/ Vintage inlines aluminum head | ||
| + | https://fordsix.com/ci/gallery/fordinlines/Aluminum/images/AH013w.jpg | ||
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| + | Aussie Cross flow swap | ||
| + | https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTiLURrPwZhhAfwYtWxY2aoVQaWPgmnqPJVFJDPbkMtc4A_f7jHEg | ||
==Cams== | ==Cams== | ||
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To use the 302 intake valve springs, start with 12 stock 302 intake outer retainers. Then take 12 stock 144-250ci 5/16" inner retainers and place them in the 302 outer retainers. Finally, you use the 144-250ci valve locks on the valve stem. Now you have a 5/16" retainer to mate the 144-250ci valves to the 302 intake springs. | To use the 302 intake valve springs, start with 12 stock 302 intake outer retainers. Then take 12 stock 144-250ci 5/16" inner retainers and place them in the 302 outer retainers. Finally, you use the 144-250ci valve locks on the valve stem. Now you have a 5/16" retainer to mate the 144-250ci valves to the 302 intake springs. | ||
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| + | Thanks to vintage inlines there is also another option which is dual valve springs which report Specs: closed 110 lbs, open 260 lbs, inst hgt 1.68, duration up to 280. All other specs are user verified. | ||
==Induction== | ==Induction== | ||
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==Ignition== | ==Ignition== | ||
| − | For Ignition, one common upgrade is the Ford Duraspark II ignitions | + | For Ignition, one common upgrade is the Ford Duraspark II ignitions. This can be run with a factory Duraspark II ignition box, an MSD box (MSD makes a Duraspark-to-MSD connector for a clean installation), or even a GM 4-pin HEI module. The GM module needs to use some form of heat sink along with thermal heat transfer compound. When buying a Duraspark II distributor, get the single port vacuum advance model. A factory application for the Duraspark II single vac distributor would be a 1978-'80 Ford Fairmont w/a 200ci inline 6. There are more but they all have the same part number. A drawback to the Duraspark II is it will not fit the 144 nor the early 170ci inline 6 engines. |
| − | Another | + | Another option is the GM style HEI distributor conversion for both the later 170ci and all 200ci engines. Take care to buy the correct part for your engine as the oil pump drives are different on the early 170ci and all 144ci and are not interchangeable with the later 170ci nor the 200ci. It has the benefit of easy installation (one fused power wire from the ignition switch, one optional tach signal wire), as well as readily available internal components, including timing curve kits, coils, caps/rotors/plug wires and ignition modules. |
==Water pump== | ==Water pump== | ||
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[[File:Electric_w-pump01.jpg|thumb|300px|left|Moroso electric water pump drive on Ford 200 CID engine]] <br style="clear:both"/> | [[File:Electric_w-pump01.jpg|thumb|300px|left|Moroso electric water pump drive on Ford 200 CID engine]] <br style="clear:both"/> | ||
| − | + | It should be noted that many remanufactured water pumps for the 200 c.i. inline six do not take into account the varied length from starting in 1975 and ending with the last engines in 83. Earlier engines produced from 1960 to 1975 have a shorter impeller on the water pump. As a result, these earlier engines, if fitted with a later model pump, may have the impeller contacting the outside of the number one cylinder wall, which obviously is not ideal. Thankfully, there is a company by the name of Flow Kooler that makes high performance water pumps for a variety of ford inline six motors including the 200. Flow kooler takes into account the late model size difference and gives you two options when ordering. | |
==Resources== | ==Resources== | ||
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*[[Six cylinder inline (other than GM) parts and info sites]] | *[[Six cylinder inline (other than GM) parts and info sites]] | ||
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[[Category:Engine]] | [[Category:Engine]] | ||
[[Category:Ford]] | [[Category:Ford]] | ||
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